# Posts by leanne

Total # Posts: 48

**Chemistry**

If the ΔH for H2O(l) → H2O(s) is -6.01 kJ, then what is the ΔH for 2H2O(s) → 2H2O(l)? A -6.01 kJ B. 6.01 kJ C. -12.02 kJ D. 12.02 kJ

**physics**

Light is an electromagnetic wave and travels at a speed of 3.00 × 10^8 m/s. The human eye is most sensitive to yellow-green light, which has a wavelength of 5.72 × 10^-7 m. What is the frequency of this light?

**geometry**

A room is 14 x 21 ft.It needs to be painted.The ceiling is eight above the floor.There are 2 windows in the room, each one is 3 ft by 4 ft. The door is 2.5 ft by 6.5 ft. 1)Find the area of the walls and ceiling to be painted. 2)one gallon of paint covers 75.86 square feet, how...

**math**

Product A This product will take 2 years to develop, at a cost of $100,000 in the first year (Yr 0) and $50,000 in the second. Revenue (benefits) in subsequent years is expected to be $100,000 per year. Product B This product will only take a year (Yr 0) to develop, at a cost ...

**science**

c and d

**mathematics**

I am two digit odd number.the sum of my digit is five.

**Math**

For a binomial distribution with n=20 trials and probability of success p=.05, we let r= number of successes out of 20 trials. Use the normal approximation to estimate P(6<=r<=12). How does this value compare with the corresponding probability obtained using the binomial...

**american history**

At the outset of the secessionist movement in the South, which state defeated the cooperationist argument that the South should act as a unit? A. Mississippi B. South Carolina C. Virginia D. Kentucky

**calculus**

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to four significant digits.) HINT [See Quick Example page 1028.] Enclosed ...

**calculus**

y=e^x*** no ex

**calculus**

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. (Round your answer to four significant digits.) HINT [See Quick Example page 1028.] Enclosed ...

**science**

You wish to heat 30 kg of water from 60°C to 80°C. How many kcal of heat are necessary to do this? To how many kJ does this correspond?

**ethics**

This is the question i was asked, "The things that will destroy us are: politics without principle; pleasure without conscience; wealth without work; knowledge without character; business without morality; science without humanity; and worship without sacrifice." ...

**Physics**

When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4Hz. Find the ratio m2/m1 of the masses.

**Physics**

When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12Hz. When another object of mass m2 is hung on the spring along with m1, the frequency of the motion is 4Hz. Find the ratio m2/m1 of the masses.

**English- poetry**

Can anyone find any poetic devices in this poem? (metaphors, similes, personification, etc) AMBITION BY DES WALSH Once upon a time A poor man Named Marcus Sat all day Hoping for food Outside a kitchen door At night he would think Of the golden sands Where he used to walk ...

**English- poetry**

Can anyone find any poetic devices in this poem? (metaphors, similes, personification, etc) AMBITION BY DES WALSH Once upon a time A poor man Named Marcus Sat all day Hoping for food Outside a kitchen door At night he would think Of the golden sands Where he used to walk ...

**algebra**

x=1.5 y=2.5 Your Welcome :)

**MATH NEED HELP!**

I have four questions in one. 1. A library crew can shelve books in six hours. Another crew can do the job in four hours. If the first crew begins and is joined by the second crew one hour later, how many hours will it take to finish the job? 2. Find a quadratic function f(x)=...

**gcse geography**

please could someone help me find the definition of a sandy beach. ive looked but cant find anything.thanks:-)

**psychology**

I need an example of how one domain of development affects the other two

**psychology**

I need an example of how one domain of development impacts the other two.

**chemistry**

C5H12+8O2->5CO2+6H2O

**art**

Write a summary comparing the characteristics and innovations of each Greek and Roman architecture in 200 to 300 words. · Provide two representative examples of architecture for each Greek and Roman cultures.

**grade 12 math**

for the function f(x)=6-5(3)^x-1/3 (a)simplify(in form =ab^kx+d (b)state the domain (c)state the range

**grade 12 math**

solve 1-tan^2x=0 , 0≤x≤2pi

**grade 12 math**

determine the inverse of y=2(3)^x+1

**Chemistry**

What substance is a better oxidizing agent in each of the following pairs? Explain. a) Co2+ or Cr3+ b) Mn2+ or I2 I think C02+ and I2 because they are above on the table. Is this correct or do I need more information in my answer?

**math**

Joe has $10,000 to purchase a used car. If the sales tax is 7% and the fee for title and license plates is $200, what is the maximum amount Joe can spend for a car?

**Japanese**

How do you answer this question below ? kazoku to doko ni sun dei masu ka ?

**home economics**

i don't no

**home economics**

wat are savory deductions

**chemistry**

i got -114.14 kj can someone confirm this?

**chemistry**

Calculate DHo for the oxidation of nitric oxide to nitrogen dioxide, 2 NO(g) + O2(g) --> 2 NO2(g), from the following data: DHof[NO(g)] = +90.25 kJ DHof[NO2(g)] = +33.18 kJ im confused...can someone help me.

**Sex Ed**

Why do guys love me

**spelling**

Please could someone tell me to how to spell 'hard-waring', the dictionary doesn't list it. Is it hard wearing, hardwaring. Thanks in advance.

**history**

many thanks.

**history**

I am doing a project on a battle. I want to say it was a 'bloody' battle. Can you help with another word as my teacher will not like this?

**geopgraphy**

What type of map shows land boundaries?

**Writin**

The assignment is to write opinionated questions that are arguable for a class discussion. One subject is the prisoners treatment during war time - can you give me an example of a possible question?

**writing**

The assignment is to make the question opinionated as well as make it argumentative for class discussion. One topic is the treatment of prisoners during war time. Can you give me an example of that?

**writing**

I need to know how to write an opinionated question?

**math**

at one high school the mean time for running the 100-yard dash is 15.2 seconds with a standard deviation of 0.9 seconds. The times are very close approximated by a normal curve. Find the percent of times that are: between 15.2 and 16.1 seconds

**Chemistry**

actually if you read the previous post again Abi. you'll realize it says the same thing! ;]

**geography**

how do trees help the enviroment ?

**textiles**

does anyone know if silk is stronger than wool , why is wool warmer than silk and why silk is more expensive than wool. thankyou

**science**

what do taste buds do and where do you find the other taste buds?

**English**

I have a Romeo & Juliet essay to be handed in 5 days from now. I mainly have to write about 'Act 3 Scene 1'. The structure paper tells me to 'Comment on the way Shakespeare contrasts the mood of this scene with the romantic atmosphere of the previous scene (Act 2 ...

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